Suppose you have two lenses of focal lengths 100 cm and 4 cm respectively. Which one would you choose as the eyepiece of your compound microscope and why?
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Answer: choose the focal length of 110 cm
Explanation: - Typical eyepieces have focal lengths of 2.5 cm or 1.25 cm. If the objective of the telescope has a focal length of 1 meter, then these eyepieces result in magnifications of 40× and 80×, respectively. Thus, the angular magnifications make the image appear 40 times or 80 times closer than the real object.
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